Thermostat temperature reading is consistently higher or lower than actual room temperature

Safety: No high‑voltage work is required for calibration.

• Step 1 – Verify with reference thermometer:
  • Place an accurate thermometer near the thermostat and wait 15–20 minutes.
  • Compare readings.
• Step 2 – Adjust temperature offset:
  • In thermostat settings, locate Temperature Calibration/Offset.
  • Adjust the offset up or down to match the reference thermometer.
• Step 3 – Check installation location:
  • Ensure the thermostat is not in direct sunlight, near exterior doors, or above electronics that emit heat.
  • Relocate if necessary.
• Step 4 – Replace thermostat if sensor is badly drifted:
  • If large offsets (>3–4°C) are required or readings are unstable, the internal sensor may be failing; replace the thermostat.